Patent US2982732A successfully refreshed from Google Patents.
US3755221A
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Fast cycling polyamide molding composition which contains a particulate nucleating agent, an alkylene diamide, and a metal salt of a monocarboxylic acid
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-12-30
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Granted: 1973-08-28
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Expires: 1991-12-30
Abstract
Abstract A fast-cycling polyhexamethylene adipamide composition containing from 0.001 to 0.5 per cent by weight of an inert nucleant, from 0.01 to 4 per cent by weight of a specified alkylene diamide, and from 0.01 to 2 per cent by weight of a specified metal carboxylate.
Inventors
- 👤 M Hitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K3/00; C08K3/16; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
29 words
A composition according to claim 1 in which the nucleating agent is present in an amount of from 0.02 to 0.2 per cent by weight of the polyhexamethylene adipamide.
Claim 2
Dependent Claim
29 words
A composition according to claim 1 in which the alkylene diamide is present in an amount of from 0.1 to 1.0 per cent by weight of the polyhexamethylene adipamide.
Claim 3
Dependent Claim
29 words
A composition according to claim 1 in which the metal carboxylate is present in an amount of from 0.1 to 1.0 per cent by weight of the polyhexamethylene adipamide.
Claim 4
Dependent Claim
14 words
A composition according to claim 1 in which the nucleating agent is calcium fluoride.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 in which the alkylene diamide is N,N''-ethylene-bis-stearamide.
Claim 6
Dependent Claim
14 words
A composition according to claim 1 in which the metal carboxylate is zinc stearate.
Claim 7
Dependent Claim
21 words
A composition according to claim 1 in which the average particle diameter of the nucleating agent is less than 0.1 micron.
Claim 8
Dependent Claim
33 words
A composition according to claim 1 in which up to 50 per cent by weight of the polyhexamethylene adipamide is replaced by an ethylene copolymer containing pendent polar groups along the polymer chain.
Claim 9
Dependent Claim
27 words
A composition according to claim 1 in which the nucleating agent has been introduced into the reaction mixture from which the polyhexamethylene adipamide is formed by polymerisation.
Claim 10
Dependent Claim
21 words
A composition according to claim 1 into which is incorporated a pigment, filler, delustrant, antioxidant, thermal stabilizer, flame-retardant, or reinforcing agent.
Claim 11
Dependent Claim
14 words
A composition according to claim 11 in which the reinforcing agent comprises glass fibres.
Claim 12
Dependent Claim
10 words
An article formed from a composition according to claim 1.
Claim 13
Dependent Claim
59 words
A fast cycling polyamide composition according to claim 1 comprising polyhexamethylene adipamide containing, by weight of the polyhexamethylene adipamide, i. from 0.001 to 5 per cent of calcium fluoride having an average diameter of less than 0.5 micron, ii. from 0.01 to 4 per cent of N,N'' -ethylene-bis-stearamide, and iii. from 0.01 to 2 per cent of zinc stearate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |